Roller grinding machine



July 21, 1936. .1. R. KELLER ROLLER GRINDING MACHINE Original Filed March 26, 1935 4 Sheets-Sheet l I]; van for. f03egoh R. f fler hit/Wm fli turn 6 By 4397C NW %5 W July 21, 1936.

J. R. KELLER ROLLER GRINDING MACHINE 4 Sheets-Sheet 2 Original Filed March 26, 1935 y 1936. J. R. KELLER ROLLER GRINDING MACHINE Original Filed March 26, 19 35 4 Sheets-Sheet 3 In uenior." Jzm /L R. fg

July 21,1936.

J. R. KELLER ROLLER GRINDING MACHINE u prigizial Filed March 26, 1955 4 Sheets-Sheet 4 v machine, takenon line .3--3- of Fig. 2

Patented July 21, 1936 Joseph R. Keller, Bridgeportyflonn, *assignor to The 'Black Rock Manufacturing ccmpany,

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Bridgeport, Conn, a corporation of Connecti- Refiled for abandoned application Serial No. 13,042, March "26, 1935. This application 'De camber 5, 1935,.Seria1No. 53,019 I Claims. (Cl. 5 49 .This' application is a substitute for abandoned application Serial Number'13,042 filed'March 26,1935. 7 Y r This invention relates generally to grinding 'machines and has particularf'r'eference to machines of this Character for grinding and thereby truing'rollers so that they will have a true 037- lindrical surface. I

"The machine has been especially designed for grinding comparatively small cylindrical rubber andc'omposite rollers employed for va'riouspub" poses including platens such asa re usedin type writers. I'lieobject of thev invention is to provide a simple form of machine of this character employing but'asinglegrinding wheel which'is directly driven and adapted for various adjustments with respect'to the rollerto be ground so that a true cylindrical surface will be produced by the grind ing operation and whereby the work maybe performed on' bo'thnewand old rollersvery accurate ly and quickly. I

The machine is of an elongateddesign'provided with means for rotatably supporting the roller to be ground longitudinally of the frame; 'while the-grinding element is mounted abovetheroller.

andfed longitudinally thereof so that the cuttings from the roller are .thrown clear of the operating mechanisms of the machine.

ing wheel backward and forward through change gearand clutch mechanisms enclosed within the speed box. .By reason of the fact that thegrindin'g wheel is hung vfrom above the roller and operates against the side of the, roller to be ground and its means-of adjustment with respect; tothe roller, the 'machine is capable of operat. ing'upon rollers varying in size between relative- 1y .wide limits and with \zvhichqtruly cylindrical rollers maybeiormed. I I I V "'Otherieatures and more specific objectsof my invention will .become readily apparent to persons skilledin the artfrom a consideration. of the following description,. when taken in conjunction with the accompanying drawings wherein Fig. v1 shows. a rear perspective view' of imprcvedsmall rubber roller grinding machine,

artly broken away;

Fig.2 showsafront-elevation, on an-enlarged scale and partially broken away of the same machine; 7 I I r .Fig. 3 showsa vertical cross section throughgthe I A screw. feed serves to move the electrically driven grind- F 'gn l shows' -"a vertieal longitudinal section through the drive'mech'anism contained within the head-stock of the machine, and taken on Fig. 5-shows a vertical cross section through the same drive mechanism takenon line 5- 5 of Fig. 4;

Fig. 6 shows an enlarged vertical longitudinal section; f the tail-stockahd its mounting shown in FigsQI and'2;

Fig.7? shows anenlarg'ed vertical cross section taken on line "'|-"l of 2; and showing hand operating meansicr theclutch;

Figs; 8 and 9 show'a side view and an end view respectively of a modified form of tail-stock adapted for holding a rubber roller'having extended metal spindle'portions adapted to run in bearings; I j I Figs. 10 and 11 show a longitudinal section and end view respectively of a coupling for drive spindle;

' Fig. 12 shows an enlarged longitudinal sectiontaken on :line l2-l 2 of Fig. 5; and

' Fig. 13 shows asimilarly enlarged elevation of the rear side of the speed boigand cooperating with-that shown in Fig. 112 'for operating a clutch' in the spee'djbox. I I I beipre stated this machine was originally designed'lor' grinding rubber and rubber. composition rollers: which are more. or less yieldable.

dueht'o the. softness of material. consequently provision has been made for acquiring delicate adjustments and relative speeds forthe roller and cuttingelernent soas to insure accurate grinding,

yet'it'should be understood that the machineis.

equally well adapted for grinding roller s of other compositions-and materials as for instance, leather. surfaced rollers, wood rollers and the like, withlittle or no change in the'machine other than possibly to substitute different cutting wheels; which .may-be readily. accomplished.

:Referring in detail to the .characters'of refer ence. marked upon thezdrawings, 15 represents a supporting leg for one .end of the machine; which; carries a guide .shaft support I6; |-'l l1 represent spacedapartglegs for the other endzo f the machine and upon whicha gear box.l8;is .supported and between which a-motor-l9iis,hung. Thelsaidend supports are tied together by lower spacing bars.2ll- -.;2ii and upper carriage guide rods;

2! which together with thehsaid .end supports form arigidirame-structure of the machine. -.It

will thus beapparentthatit wouldbe acompara ti velysimplezmatter tozconstructzmachines of,:this

type and by the use of longer or shorter bars produce a longeror shorter machine for grinding longer or shorter rollers; as might be required. The motor I9 adjustably mounted on the legs l1 7 1 includes a drive'shaft 22 for carryinga vari-speed pulley 23Ishown'upon the end of the machine in Fig. 1, and'whichf is connected by a'belt 24 to a V driven pulley 25 on a comparatively short shaft 2G,'one end of which is journaled in bearingsof the housing and the other end in a'web'2 1 extending from the front to therearfwall of the housing [8. This shaft 26 carries'a small pinion r a;center and work driver 33 which serve to support and drive one endofthe rroller A to be 28, see Figs. 4 and 5, thatmeshes with two larger gears 29 and 30, one mounted upon the work revolving spindle 3| and the other mounted'upon a third shaft 32 of the change speed mechanism. "This spindle and shaft 32 are journaled in theop- 'po'site side portions of the housing and extends freely through the before mentioned web 21'. Upon the inner end of the shaft 3| is mounted ground. 7

adapted for. engagement with large gears 38. 39 and 40 on the before mentioned shaft 34 whereby said'shaft 34 maybe driven at three different speeds with respect'to the shaft 32. t a f A two-gear cluster 4| is slidably'mounted'upon' the intermediate shaft 34 that is adapted to mesh w'iththe gears 42 and 43 'upon the short" shaft 35 which is journaled in part in a'bracket 44 secured to thesides of the gear' housing. The clustergears 4Ifwhich'are' splinedtoithe shaft, are adapted to be moved longitudinally" thereonv "through a shifting lever 45, its rocker'sha'ft.

andua depending arm .41. The cluster 31 is like wise 'slidable uponits shaft '32 for engagement with either of the three large gears through a shiftinglever 48, its' ro cker shaft 49 and depending arm 5!]. Both these levers 45 and 48 are mounted on their respective shaftsoutside of the gearhousing, asis clearly shown in Figs. 2 and 5;;

On this short shaft 35 is mounted a'small gear 5| which drives an idler gear v52 that in turn meshes withand drives a small clutch-faced gear.

' 53 that is looselymounted 'upon'the screw shaft 36." A second gear 54' is mounted on the inner end of ,the shaft 35 and. meshes with asecond clutch-faced gear 55 looselymounted on the screw shaft-36 and is held against' longitudinal move mentby a collar-56.

"A slidable clutch sleeve 51 is splinedto the screw shaft 35 intermediate of the two clutchfaced gears 53 and 55 for driving the screw either 7 forward or backward. Thisclutch sleeve 51 may be either hand orautomatically operated through- 7 a slide rod 58, see Fig. ljorie end portion of which is slidably mounted in oppositewalls of the" gear housing and extends longitudinally of the machine and has its other'end similarly mounted in the upper portionof the guide shaft support] 5.-

' The automaticmeansforoperating the slide rod an'd' clut ch comprises'a sleeve 59, see Figs; 4, 5' and 12, which'is provided with an annular flange 60".

upon each end and an integral project'edarm 6| 1 having a forked end-portion 62 that engages the annular groove in the clutch sleeve 51, and whereby, the same" is operated. fThe shifting rod 58 passes freely through a lug 63 }se'cu'red t0 the latch 68 is mounted.

motor carriage 64, see Fig. 3, and serves as a means for engaging either of the adjustable collars 65 mounted upon the rod 58, which; when enthe direction of rotation of the screw and move-1 ment of the carriage This additional mechanism referred to, and associated with'the rod and clutch, is to' insure the quick disengagement of the clutch sleeve from either clutch-face gears, and the'prompt engagement of the opposite face of the clutch sleeve'with the opposite clutch-face gear; therebypreventing the slidable clutchmember from remaining in a neutral position. In this connection, attention 'is again'directed toFigs. 4, 5 and 12, wherein it will be seen that adjacent to the before-mentioned clutch mechanism asleeve 59 is mounted upon the rod fli -intermediate of collars 6666 secured to the rod, and that coil springs 61 are so mounted upon the rod intermediate'ofsaid collars .66 land the ends of the sleeve 59 as to be compressedwithi the preliminary movement of the rod c.ausing en-h gagement of the collar 65, see Fig. 3 with theilug 63 until the high side of the collar engages the free end of one of the latchesJSB and raises its" tooth out of engagement with 'the flanger been; the end of the sleeve 59.. I This release of the. latch permits the sleeve to'be thrown forwardsothat.

the flange on the other end of thesleeve :willride under and into engagement with the tooth of the second latch, which obviously serves 'to shift the clutch 5'! and cause the carriage to be moved inan opposite direction. In this connection itwill seenthat by simply. changing the position of the adjustable coll ars 65 onthe trip rod 58;:1the car 7 riage can bejmade to travel longer or shorter distances, as maybe, necessary, according-to the length of the rollers to be ground. fBy this means,

the grinding wheelcancbe operatedlbackwardland forward the length of the. roller to be ground, as

often'as'may be necessary, to insure ,a perfecti cylindrically finished roller In this connection, and as before suggested, it. is also possible for. the operator to manual1yIre-' versethe movement of the carriage at any time by means of a hand leverc69, see Figs. '2 andi'],

' which is hinged toa' bracket 'lofadiustably mounte ed an the rear guide bar 2| whileanother portion of the lever. is operatively connected to a stud 'I I 7 adjustably secured to :thefcarriage reversing trip;

rod 58, after which the said rod can readily he slid backward or forward to perform the tripping operations. It will also be understood that when 1 the bracket 10 is reset'on the 'rearjguidecbar 2 l,.

the stud'l'l with which the operatlnglever islalso connected. t Itfis also possible to stop the movement of, the carriage by an operation of the lever 59 andits rod '58, if one or theother of the. latches are. previously raised, which raising movement' ,is' ac-' complishedfsee Figs. 1. 12 and 13,'by a'tn 'a'djust-f ment of one of the twol imit 'piris 12 that'fard mounted in brackets13'up0'n the'outside bribe gear housing I4, and provided with a slot to ac commodate a small pin .14 carriedby' the limit pin'12. The 'upper end of this limit pin serves for the engagement of an arm mounted upon the end of the short shaft- 15' upon"which the .In order to insure the lat normal-11y y i in their IOWeYposition, a sprin 11 i provided. ne end being secured to the gear u g 7 it will be necessary to reset the bracket" bearing the other to the free endtof thearm- 15. There are :obviouslytwo of these limitpins 'l2..an.d asso-' ciate mechanisms, one for each of =the latches 58,

as :will be'readily understood :from Figs. .12 and 1-3.v In thisrespect it will be apparent that when the limit pin is down, as shown to the left in:Fig.fi

1-3, the latches are freeto act normally, whereas if rais'ed' to the position shown on the zrightxin.

Fig. 13 the latch would be brought out of "open.-

ate'd position-and thus insure the stopping ofithe carriage'at-one end of its travel. iltiwillibe obvious from the foregoingthat by the'raising of both of the'limit pins,'a stoppage of thecarriage 'in any position can be accomplished by the hand lever 69, when travelling in either direction, by a manual'sliding movement of the rod 53 to'bring its clutch 51 to an intermediate position.

The cutting element may be in the form of'an' abrasive wheel or other suitable cutter; designated as 18,*and is mounted directly upon the mo to-r shaft and hung to operate at a right angle to the roller A and-can be driven to turn with-or against'the roller. 7

' Th'e'motor is enclosed in a frame 19, the'top portion of which is secured to a member 80 which is dove-tailed to receive corresponding dove-- tailed ways 8! of the motor-carriage 64. This:

f'erring to Fig. 3, it will beseen thatthe member- -80 is provided with a threaded nut 84 that is en-' gaged by an adjusting screw 85ijournaled in the motor carriage and whereby the motor and its grinding wheel may be adjusted 'forward and backward with respect to the face-of the roller.

The before-mentioned feed screW-3B,see Figs, 2 and -3, passes through an internally threaded sleeve 8'5 to one end portion of which a small pinion 81 is secured while 'acolIar-Sil is also secured to the other endof the sleeve'in away 'to hold it in the bearing of the upright 89"against endwise movement. The sleeve of "courseis held from rotating within its bearings'o that with-the turning of the'screw, as by power, the'carriage will be fedlengthwise of themachine in one di-' rection or the other according" to-the directionthe'shaft is rotated; whereas on'the' other hand;

if themachine is not running and' it is desired to adjust .the carriage, it can be accomplished through the gear-tilmounted upon the shaft 9| journaled in the upper part of the said upright 89, and provided with an adjusting wheel 92. In this connection, it will be observed that when the machine is mechanically driven, the gear 90 and shaft 9| are held against rotation by means of set screw 93 which in turn holds the smaller gear 81 and its sleeve 86 against rotation forming so to speak a fixed nut within the bearing for the engagement of the feed screw 36.

The tail stock 94 shown in Figs. 1, 2 and 6 is of a design employed for grinding rollers on centers; whereas when grinding rollers having journals a, as indicated in Figs. 8 and 9, a pair of journal supports 95 similar to that shown in Figs. 8 and 9 would be employed, one for each end journal a of the roller, though the roller would be driven from and in line with the driving shaft 26, in which case a flexible drive chuck 96, such as shown in Figs. 10 and 11, would be employed. The lower portion 9? of the tail stock 94 shown in Fig. 6 and the journal support 95 shown in F-igss 8 and '9 are similar, :whereas :the upper iponr' tions ofthese two designs. .of supportsiareadapted-xi toireceive' the ends of thetwotypesof rollers;- -.-J

"Referring. therefore to;.said Figs. 6, Band 9,-':i.t' will beseen that the lower or base member. 91: ispmounted' upon .the front bar ZOhaVinganflat undersurface 98 adapted. to .beengaged by-Jclamp-s ingzmeans comprising ashaft199, an eccentric {Hill i and an operating lever Jill which serves to align a-nd secure the basefi'iin any position upon the rod While..the upright I82 of the tail, stock and. the upright I03 ofthe journal .bearingare differ-5 ent in detail, Lyet theyxarerboth adapted ,to be adjustab-lyflmounted on the base member ,-9|.-

The said-base member isprovided with ways I04,

to receive a corresponding, ribin ,the (tail stock ed an-dsupport 95.so as. to per'mitcrosswiseaad-w justment of .the roller with respect-to the base and an adjusting screwjslo5. that engages -;a

tapped Mg 106 serves to move the pedestalifor-i ward andbackward. x A

. The upright journal support'95 is'provided-with an elongated concaved recess ;to..receive; a correr spondingly shaped bushing l (iTinrwhiChthe end: of-the roller bearing a .is' mounted; This bear:

ing is heldin position and rotates underthe outer end of an arm I88 that issecured to a vertical shaft I09 loosely mounted in the bearin'gsof the; This shaft I99 alsoipas'ses through support. I I ii. a' locking member 4 H which is provided with a threaded shank to receive :a put I i 2 which, when operated, serves to drawthelocking member upagainst theside of the shaft-to clamp it i1'l"pOSi tion.

The uprightfi l serves to enclose mechanism comprising the upper portion of the .tail. stock andeinclude's' acenter 113, a quillv H4 which re:: ceives the center, and inpart enclosesxta'spring H5, one end of which is seated within the quilt and' the' other against an adjusting screw l lfi mountedin the'end portion .of theupright'. .The" center may be drawn" back against the action or the spring for the placing of a'roller 'in the imachine through a small lever 'l I] that is suitably fulc'rumed and engages a pin :l-lilsecured in the quilLas is clearly shown in Fig.'6.

journal ends a, as shownin'JFig. 8,=instead"0f pintle ends.

shown, and includes an internal annular-pocket 20 to receive the flanged end of a holder l2l to support one of the end journals a, when secured therein by a set screw I22. Spaced-apart pins l23 carried by the sleeve H9 serve to engage slots in the flanged end of the holder 2| so as to provide a flexible driving connection for the holder and its journal a by the shaft 3| and its sleeve.

Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. In a roller grinding machine, the combination with a frame of a feed screw journalled in the frame supports, a driving spindle, a tail stock adjustably mounted upon the frame and in alignment with the axes of the said driving spindle, a

driving shaft, connections therewith for driving the spindle, change speed gearing through which abovethe driving spindle andtail stock and connected to be'moved longitudinally by the feed scr ew, a' motor and grinding wheel-jadjustably mounted upon the underside of the carriage, in

a manner to operate on'a roller carried below on the spindle and tail stock, an automatic trip mechanismadapted to be engaged and operated by the motor carriage to operate the clutching a 1 way to reverse'the rotation of the feed screw.

j 2.111" a rollergrinding-machine, the combination with a'frame comprisinga pair of lower bars, a pair of guide rods positioned'above the said bars, a feed screw 'between' the'said guide I rods, a driving spindle, a tail stock mounted upon the said" lower bars'and in alignment with the axesof the said driving spindle for supporting a 'roller to'be ground, a driving shaft; connections :speed'gea'ring throughjwhich' the feed screw is therewith for driving the spindle, change speed gearing through which the feed screw is operated, 'jclutch mechanism intermediate the change speed mechanism' and the feed screwcwhereby the latter may be driven forward or backward, a carriage 'slidably mounted upon the guide rod and connected 'tobe moved longitudinally by thefeed, screw, a motorand grinding'wheel adjustably 'mounted' upon thejunderside, of the carriage, and

beneath thefguide, rods in position to operate upon a roller when carried by the spindle and tail stock, an automatic trip mechanism adaptedto1 be engaged and operated by the motor carriage candto operate the clutch in a way to, reverse 7 J the rotation of the feed screw, and hand operating m'eans'for'shifting the clutch to reverse the direction of rotation of the feed screw.'

7 In aroller grindingimachine, the combination w ithga frame comprising end'supports of .a pair of lower bars connecting the supports, a; pair of, guide 'rodsalso connecting said supportsand positioned above the said bars, of a feed screw positioned between the said guide rods and journalled in thesaid supports, ,a' driving spindle, a tail' stock adjustablyI mounted upon one of the saidlower bars and in alignment with the axes of the said driving spindle, a driving shaft, con- 7 nections therewith'fo'r driving the spindle change operat'e'd,a clutchmechanism intermediate the change speed mechanism" and the feed screw whereby the latter may be driven forward or backward, a carriage slidably mounted upon the c fguide rod and connected to be moved'longitudinally'by the feed screwia motor and grinding wheel adjustably mounted upon the underside of the carriage and beneath the guide rods in position to operate upon 'a mner when carried below bycthe spindle and tail stock, an-automatic trip mechanism adapted" to be engaged and operated by the motor carriage andito operate the clutch in a manner to reverse the'rotationof the feed screw. c c

'4. In a roller grindin'g machine, the combina f tionwith 'spacedapart upper and lower frame members of a feed screw associated with theup-c per frame-members, a driving spindle and tail stock positioned intermediate of the upper and.

' lower frame members adapted to support a roller." to be ground, a clutch mechanism through which the feed screw iscoperated, a carriage slidablymounted upon the upper frame members-and con- ;gaged by the carriage, a cushioning means mount: 1 1

ed upon the slide rod, including asleeve upon. the rod through which the clutch is manipulated,

springs-upon the rod in engagementwith the ends of the sleeve and collars upon the rod against whichfthe opposite ends of thefs'prings ,-abut,1 V

and pawls to engage and disengage the f collars and sleeve whereby theftwo alternately engage and release the latter. ,1 a V 7 i 5; In a roller grinding machine, the combina-' tion with spaced apart 'upper and'lowerxframe members of a feed screw associated with the up percframe members a driving spindle and tail;

stockcpositioned' intermediate of the upper and lower frame members adapted to support a roller to be ground, a clutchfmechanism through whichithe feed screw'i s operated, a carriage slidably mounted upon the upper, frame members, a

' sleeve journalled in the;carriage and cthreadably mounted on thefeed screw, a pinioncsecured tothe, sleeve, a" gear meshing with the pinion, a

shaft for the gear hand means for operating the shaft, gearsleeve and carriage independent of the feed screw, means for locking the shaft and;

sleeve against rotation to insure longitudinalf movement 'of the carriage with respect to the feed screw,--a motor'and' grinding wheel mounted upon the carriage in position tooperate upon the roller when carried. by the spindle and tail stocki JOSEPH R. KELLER. 

